Search results
Results from the WOW.Com Content Network
Epiretinal membrane or macular pucker is a disease of the eye in response to changes in the vitreous humor or more rarely, diabetes.Sometimes, as a result of immune system response to protect the retina, cells converge in the macular area as the vitreous ages and pulls away in posterior vitreous detachment (PVD).
The RNFL formed by the expansion of the fibers of the optic nerve; it is thickest near the optic disc, gradually diminishing toward the ora serrata.. As the nerve fibers pass through the lamina cribrosa sclerae they lose their medullary sheaths and are continued onward through the choroid and retina as simple axis-cylinders.
OCT findings in Berlin's edema have included increased reflectivity because of photoreceptor outer segment disruption and, less frequently, hyper-reflectivity of inner retinal layers. Other findings include increased central retinal thickness, a low signal triangular area below the foveal pit, and outer retinal thickening.
The vitreous humour is fluid-like near the centre, and gel-like near the edges. The vitreous humour is in contact with the vitreous membrane overlying the retina . Collagen fibrils attach the vitreous at the optic nerve disc and the ora serrata [ 1 ] (where the retina ends anteriorly), at the Wieger-band, the dorsal side of the lens.
Bruch's membrane or lamina vitrea [1] is the innermost layer of the choroid of the eye. It is also called the vitreous lamina or Membrane vitriae , because of its glassy microscopic appearance. It is 2–4 μm thick.
One of the cat diseases caused by malnutrition is central retinal deficiency, a dysfunction in cats that can be hereditary as well. [14] The retina, a thin layer of tissue in the back of the eye, is the structure affected by this disorder. This structure receives the light gathered and focused from the lens. [15]
The causes of macular edema are numerous and different causes may be inter-related. It is commonly associated with diabetes.Chronic or uncontrolled diabetes type 2 can affect peripheral blood vessels including those of the retina which may leak fluid, blood and occasionally fats into the retina causing it to swell.
Diagram of the human eye showing macula and fovea. Although J. D. Gass originally identified four types of idiopathic juxtafoveolar retinal telangiectasis in 1982, contemporary researchers describe three types collectively known as idiopathic juxtafoveal telangiectasia: macular telangiectasia type 1, macular telangiectasia type 2, and macular telangiectasia type 3.